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    <title>Document</title>
    <style>
        .c {
            color: red;
        }

        .c span {
            color: green;
        }

        .c h1,
        h2,
        span {
            color: #000;
        }

        .c .pp span {
            font-size: 40px;
        }

        .c .mm span strong em,
        i {
            color: hotpink;
            font-size: 50px;
        }
    </style>
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<body>


    <div class="c">
        <h1>H1</h1>
        <h2>H2</h2>
        <span>123</span>
        <p class="pp">p<span>2</span></p>
        <p>3</p>
        <p class="mm">
            <span>
                <strong>
                    <em>23455 <i>6788</i></em>
                </strong>
            </span>
        </p>
        <p>3</p>
        <p>3</p>
        <p>3</p>
        <p>3</p>
    </div>

    <p class="mm"></p>


    <p class="pp">rrrr</p>


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